Protection against relay attack for keyless entry systems in vehicles and systems

ABSTRACT

Aspects of the subject disclosure may include, for example, a device in which a processing system of a remote entry system selects a first circuit from a plurality of circuits of a key remote from the device; wirelessly transmits a first challenge signal to the key, the first challenge signal specifying the first circuit; and wirelessly receives a first response signal from the key, the first response signal having a first response signal power level and a first response signal delay with respect to the first challenge signal. The processing system analyzes the first response signal by comparing the first response signal power level and the first response signal delay respectively with a predetermined first signal power and predetermined first time delay associated with the first circuit; and, in accordance with the comparing, determines whether to enable the entry system. Other embodiments are disclosed.

FIELD OF THE DISCLOSURE

The subject disclosure relates to keyless entry systems, and more particularly to a method and device for protection against a relay attack on keyless entry systems.

BACKGROUND

Keyless entry systems, for example remote-signaling key fobs used to unlock vehicles, can be attacked by relay devices that intercept and copy the legitimate signal.

BRIEF DESCRIPTION OF THE DRAWINGS

Reference will now be made to the accompanying drawings, which are not necessarily drawn to scale, and wherein:

FIG. 1 is a block diagram illustrating an exemplary, non-limiting embodiment of a communications network in accordance with various aspects described herein.

FIG. 2A is a block diagram illustrating an example, non-limiting embodiment of a system functioning within the communication network of FIG. 1 in accordance with various aspects described herein.

FIG. 2B is a timing chart illustrating operation of the system of FIG. 2A, in accordance with various aspects described herein.

FIG. 2C is a block diagram schematically illustrating a keyless entry system in accordance with embodiments of the disclosure.

FIG. 2D is a timing chart illustrating operation of the system of FIG. 2C, in accordance with various aspects described herein.

FIG. 2E is a flowchart depicting an illustrative embodiment of a method in accordance with various aspects described herein.

FIG. 2F is a block diagram schematically illustrating a keyless entry system in accordance with additional embodiments of the disclosure.

FIG. 2G is a flowchart depicting an illustrative embodiment of a method in accordance with various aspects described herein.

FIG. 3 is a block diagram illustrating an example, non-limiting embodiment of a virtualized communication network in accordance with various aspects described herein.

FIG. 4 is a block diagram of an example, non-limiting embodiment of a computing environment in accordance with various aspects described herein.

FIG. 5 is a block diagram of an example, non-limiting embodiment of a mobile network platform in accordance with various aspects described herein.

FIG. 6 is a block diagram of an example, non-limiting embodiment of a communication device in accordance with various aspects described herein.

DETAILED DESCRIPTION

The subject disclosure describes, among other things, illustrative embodiments for challenging and authenticating a key of a remote entry system, based on responses from selected circuits or sequences of circuits of the key. Other embodiments are described in the subject disclosure.

One or more aspects of the subject disclosure include a device comprising a processing system and a memory; the processing system includes a processor, and the memory stores executable instructions that, when executed by the processing system, facilitate performance of operations. The operations comprise selecting a first circuit from a plurality of circuits of a key remote from the device and associated with an entry system coupled to the device; wirelessly transmitting a first challenge signal to the key, the first challenge signal specifying the first circuit; and wireles sly receiving a first response signal from the key, the first response signal having a first response signal power level and a first response signal delay with respect to the first challenge signal. The operations further comprise analyzing the first response signal by comparing the first response signal power level and the first response signal delay respectively with a predetermined first signal power and predetermined first time delay associated with the first circuit; and, in accordance with the comparing, determining whether to enable the entry system.

One or more aspects of the subject disclosure include a machine-readable medium comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations. The operations comprise selecting a first circuit from a plurality of circuits of a key remote from the processing system and associated with an entry system coupled to the processing system; wirelessly transmitting a first challenge signal to the key, the first challenge signal specifying the first circuit; and wireles sly receiving a first response signal from the key, the first response signal having a first response signal delay with respect to the first challenge signal. The operations further comprise analyzing the first response signal by comparing the first response signal delay with a predetermined first time delay associated with the first circuit and, in accordance with the comparing, determining whether to enable the entry system.

One or more aspects of the subject disclosure include a method that comprises selecting, by a processing system including a processor, a first circuit from a plurality of circuits of a key remote from the processing system and associated with an entry system coupled to the processing system, and transmitting, by the processing system, a first challenge signal to the key, the first challenge signal specifying the first circuit. The method also comprises receiving, by the processing system, a first response signal from the key, the first response signal having a first response signal power level and a first response signal delay with respect to the first challenge signal; and analyzing, by the processing system, the first response signal by comparing the first response signal power level and the first response signal delay respectively with a predetermined first signal power and predetermined first time delay associated with the first circuit. The method further comprises determining, by the processing system in accordance with the comparing, whether to enable the entry system; the entry system comprises a door lock of a vehicle, a trunk lock of the vehicle, and/or a switch controlling lights of the vehicle.

Referring now to FIG. 1, a block diagram is shown illustrating an example, non-limiting embodiment of a communications network 100 in accordance with various aspects described herein. For example, communications network 100 can facilitate in whole or in part selecting a first circuit from a plurality of circuits of a key remote from a device and associated with an entry system coupled to the device; transmitting a first challenge signal to the key, the first challenge signal specifying the first circuit; and receiving a first response signal from the key. In particular, a communications network 125 is presented for providing broadband access 110 to a plurality of data terminals 114 via access terminal 112, wireless access 120 to a plurality of mobile devices 124 and vehicle 126 via base station or access point 122, voice access 130 to a plurality of telephony devices 134, via switching device 132 and/or media access 140 to a plurality of audio/video display devices 144 via media terminal 142. In addition, communication network 125 is coupled to one or more content sources 175 of audio, video, graphics, text and/or other media. While broadband access 110, wireless access 120, voice access 130 and media access 140 are shown separately, one or more of these forms of access can be combined to provide multiple access services to a single client device (e.g., mobile devices 124 can receive media content via media terminal 142, data terminal 114 can be provided voice access via switching device 132, and so on).

The communications network 125 includes a plurality of network elements (NE) 150, 152, 154, 156, etc. for facilitating the broadband access 110, wireless access 120, voice access 130, media access 140 and/or the distribution of content from content sources 175. The communications network 125 can include a circuit switched or packet switched network, a voice over Internet protocol (VoIP) network, Internet protocol (IP) network, a cable network, a passive or active optical network, a 4G, 5G, or higher generation wireless access network, WIMAX network, UltraWideband network, personal area network or other wireless access network, a broadcast satellite network and/or other communications network.

In various embodiments, the access terminal 112 can include a digital subscriber line access multiplexer (DSLAM), cable modem termination system (CMTS), optical line terminal (OLT) and/or other access terminal. The data terminals 114 can include personal computers, laptop computers, netbook computers, tablets or other computing devices along with digital subscriber line (DSL) modems, data over coax service interface specification (DOCSIS) modems or other cable modems, a wireless modem such as a 4G, 5G, or higher generation modem, an optical modem and/or other access devices.

In various embodiments, the base station or access point 122 can include a 4G, 5G, or higher generation base station, an access point that operates via an 802.11 standard such as 802.11n, 802.11ac or other wireless access terminal. The mobile devices 124 can include mobile phones, e-readers, tablets, phablets, wireless modems, and/or other mobile computing devices.

In various embodiments, the switching device 132 can include a private branch exchange or central office switch, a media services gateway, VoIP gateway or other gateway device and/or other switching device. The telephony devices 134 can include traditional telephones (with or without a terminal adapter), VoIP telephones and/or other telephony devices.

In various embodiments, the media terminal 142 can include a cable head-end or other TV head-end, a satellite receiver, gateway or other media terminal 142. The display devices 144 can include televisions with or without a set top box, personal computers and/or other display devices.

In various embodiments, the content sources 175 include broadcast television and radio sources, video on demand platforms and streaming video and audio services platforms, one or more content data networks, data servers, web servers and other content servers, and/or other sources of media.

In various embodiments, the communications network 125 can include wired, optical and/or wireless links and the network elements 150, 152, 154, 156, etc. can include service switching points, signal transfer points, service control points, network gateways, media distribution hubs, servers, firewalls, routers, edge devices, switches and other network nodes for routing and controlling communications traffic over wired, optical and wireless links as part of the Internet and other public networks as well as one or more private networks, for managing subscriber access, for billing and network management and for supporting other network functions.

FIG. 2A is a block diagram illustrating an example, non-limiting embodiment of a system 201 functioning within the communication network of FIG. 1 in accordance with various aspects described herein. A user 210 carries a key 211 for remotely unlocking a vehicle 290; key 211 includes a processing system 215 coupled to antenna 212. The vehicle includes a processing system 291 coupled to antenna 292. In general, the key and the vehicle can engage in two-way wireless communication using any of a variety of protocols and frequencies. For example, as detailed below, processing system 291 can include a radio frequency identification (RFID) reader and processing system 215 can include multiple RFID tag circuits.

FIG. 2B is a timing chart 202 illustrating operation of the system of FIG. 2A, in accordance with various aspects described herein. In an embodiment, the vehicle system 291 wirelessly sends periodic probing messages 221 to activate (“wake up”) a key that is within range of system 291. The key then returns an acknowledgement message 222. In this embodiment, the vehicle system 291 transmits via antenna 292 at approximately 125 KHz (termed “low frequency” or “LF” herein), while the key transmits via antenna 212 at approximately 433 KHz (termed “high frequency” or “HF” herein), although other frequencies and communication protocols may be used. The acknowledgement can be performed by either an active RFID key (where the key includes a power source connected to the RFID circuits) or a passive RFID key (where the vehicle system provides the key with power via the probe message).

The vehicle system sends a challenging message 223 to the key, expecting the key processing system to respond after a delay time and, in an embodiment including active key circuits, with a power level characteristic of the key and known to the vehicle system. If the key response 224 is correct (that is, the arrival time and power level of the response 224 are within acceptable ranges), the vehicle processing system proceeds to unlock the vehicle and/or perform or enable other functions at the vehicle. In an embodiment, the acknowledgement signal from the key indicates the desired operation (e.g. unlock one or more doors, unlock trunk, control a switch to turn on lights, etc.).

In this embodiment, the vehicle processing system 291 includes an RFID reader, and the key processing system 215 includes multiple RFID tag circuits. The vehicle processing system can send multiple challenge messages to the key processing system, as detailed below.

FIG. 2C is a block diagram schematically illustrating a keyless entry system in accordance with embodiments of the disclosure. The vehicle processing system 291 includes interconnected elements (modules) and a processor, while the key processing system 215 includes interconnected modules, a processor, and RFID circuits. As shown in FIG. 2C, the vehicle processing system 291 in this embodiment includes a low-frequency wake-up module 231 for generating the wake-up messages, a high-frequency module 232 for receiving transmissions from the key, a power module 233, and a processor 225. The key in this embodiment is an active key, in which the processing system 215 includes a low-frequency receiver module 234 for receiving the wake-up message, a high-frequency module 235 for transmitting responses to challenges, a power module 237, and a processor 227. The key processing system 215 further includes multiple RFID circuits (four shown in FIG. 2C: 236-1, 236-2, 236-3 and 236-4). In this embodiment, the RFID circuits are coupled to power module 237, so that each of the RFID circuits can cause transmission at a distinct power level characteristic of that RFID circuit.

The vehicle system 291 directs multiple challenges 238 to the key. Each challenge is directed towards a distinct RFID circuit, or a sequence of RFID circuits, as prescribed by the processor 225. The key HF module 235 is programmed to direct the challenge to the RFID circuit(s) selected by the processor 225.

Each of the circuits 236-1, 236-2, 236-3, 236-4 is characterized by a distinct delay time (that is, a delay in providing a response signal when a challenge from the vehicle system is directed to that circuit by the HF module 235) and (in this embodiment where the key RFID circuits are active circuits) a distinct signal power level. This information is stored in a storage device accessible to the vehicle processor 225; the vehicle processor can thus authenticate the key by comparing the response signals with the stored circuit characteristics. It will be appreciated that this RFID challenge/response authentication procedure can be performed in conjunction with other authentication techniques; for example, one or more of the key circuits can respond with a coded signal corresponding to a password known to the vehicle processing system.

FIG. 2D is a chart 204 of timing sequences in authentication procedures 2401-2403 where the vehicle and key of FIG. 2C communicate, in accordance with various aspects described herein.

In sequence 2401, the vehicle system 291 sends a signal 241 to the key 211; the signal arrives at the key with a transit time t, as shown on timeline 2400. The key generates a reply signal during a processing time 242; the reply signal 243 arrives at the vehicle system at time T0. The vehicle system thus can learn the basic round trip time (RTT) T0 for challenge signals directed to the key. In an embodiment, T0 is determined by the RTT of the wake-up and acknowledgement signals 221, 222.

In an embodiment, the vehicle processing system directs a challenge 2402 to the key by specifying one of the circuits in the key processing system (in this example, circuit 236-3). The challenge signal 244 is directed by the key HF module 235 to circuit 236-3, which has a characteristic delay time D3. The response signal 246 from the key (in this embodiment, having a power level characteristic of an active RFID circuit 236-3) arrives at the vehicle system at time T1. As shown in FIG. 2D, the time T1 is the sum of T0 and the delay time D3 associated with circuit 236-3. The vehicle system thus can authenticate the key based on the characteristic delay and signal power level of the circuit specified in the challenge. The vehicle system can also use the RTT of the challenge and response signals to calculate the distance between the vehicle and the key, which can be used as an additional criterion for authentication (e.g. the response signal is not evaluated unless the key is within a predetermined distance from the vehicle).

In a further embodiment, the vehicle processing system directs a challenge 2403 to the key by specifying a sequence of circuits in the key processing system (in this example, active RFID circuits 236-3, 236-1, 236-4). The challenge signal 247 arrives at the key and is routed by the key HF module 235 to circuits 236-3, 236-1 and 236-4 in sequence. A response signal 248 from the key arrives at the vehicle system at time T2. The time T2 is the sum of T0 and the delay times D3, D1, D4 associated with circuits 236-3, 236-1, and 236-4 respectively. The signal 248 arriving at T2 has a signal power associated with circuit 236-4. The vehicle system thus can authenticate the key based on the characteristic delays of the circuits specified in the challenge and the characteristic signal power level of the last circuit of the specified sequence. The vehicle system can be programmed to repeat a challenge if authentication criteria are not met; that is, if the response delay and/or power level is not within a prescribed range based on the characteristic delays and power levels known to the vehicle system. The vehicle system can also be programmed to authenticate the key if the criteria are met in two successive challenges, in two of the last three challenges, etc.

In additional embodiments, the vehicle processing system directs multiple challenges to the key at random time intervals, with each challenge specifying a distinct circuit or sequence of circuits of the key processing system. For example, the vehicle system can direct challenge 2402 to the key, followed after a random interval by challenge 2403, followed after another random interval by a challenge specifying a different sequence of circuits, and so on.

In a further embodiment, the vehicle processing system generates a random time sequence of challenges (e.g., a stream of random numbers that is converted into a schedule for issuing challenges) and/or a random sequence of circuits for each challenge.

In another embodiment, the vehicle processor uses the value of T0 to determine the distance between the key and the vehicle. The vehicle processor can be programmed to unlock the vehicle only if the key is within a prescribed distance (e.g., 20 feet) even after authentication of the key is complete. The vehicle processor can also be programmed to perform other functions (e.g., unlock the trunk, turn on lights) if the key is within the prescribed distance. A threshold distance can be prescribed for each function separately (e.g., control a switch to turn on an interior light if the key is within 100 feet, but turn on headlights only if the key is within 40 feet). In addition, by performing multiple challenges in a brief time period (e.g. a flurry of 10 sequences in 5 seconds), the vehicle system can obtain information regarding the trajectory of the key over that time period; for example, whether the distance from the vehicle to the key is decreasing and if so, at what speed. The vehicle system may be programmed to perform selected functions depending on the trajectory; for example, flash the headlights if the key is not moving toward the vehicle (e.g. when the driver is searching for the vehicle in a parking lot), and unlock the vehicle only if the key is moving toward the vehicle.

FIG. 2E shows a flowchart depicting an illustrative embodiment of a method 205 in accordance with various aspects described herein. In step 2502, the vehicle processing system 291 transmits a wake-up signal to key 211 (in this embodiment, an active key). The vehicle processing system receives an acknowledgement from the key (step 2504), and determines the signaling round-trip time and the distance between the vehicle and the key (step 2506). The vehicle processing system then selects one or more circuits of the key for sending a challenge (step 2508). A challenge signal is transmitted to the key (step 2510), specifying the circuit (or sequence of circuits) in the key to be activated.

The processing system of the key directs the challenge to the one or more circuits specified by the vehicle processing system (step 2512). The key then transmits a response signal (step 2514) having a delay time associated with the circuit(s) selected by the vehicle processing system. In this embodiment, the response signal is transmitted at a power level associated with the circuit at the end of the sequence.

The vehicle processing system analyzes the response signal (step 2516); in this embodiment, the delay times and power levels of the response signal are compared with stored values of delay time and power for the respective key circuits. If the response signal from the key meets prescribed criteria (step 2518/Y), one or more further challenges may be made (step 2520/Y); if not (step 2518/N), the authentication fails. If no further challenges are desired (step 2520/N), the vehicle processing system proceeds (step 2522) to perform or enable the requested operation (e.g. unlock the car).

FIG. 2F is a block diagram schematically illustrating a keyless entry system 206 in accordance with additional embodiments of the disclosure. As shown in FIG. 2F, user 210 can activate a remote entry system with a mobile phone 261 that initiates communication with the vehicle processing system 291 (as distinct from the system of FIG. 2A, where the key responds to a probing signal from the vehicle). In this embodiment, the vehicle processing system and the mobile phone use digital certificates 265 to authenticate each other. The mobile phone and vehicle processing system can also exchange messages to establish the round-trip signaling time and the distance between the mobile phone and the vehicle. In another embodiment, an automated system 281 (e.g. at a car dealer or manufacturer) initiates communication with the vehicle processing system, using digital certificates 266 for authentication.

In further embodiments, software installed at the mobile phone 261 or system 281 has one or more loops that, on execution of the software, provide time delays and thus can simulate key circuits as described above. The vehicle processing system can then transmit a challenge to mobile phone 261 or system 281, specifying one or more software loops; the response signal thus includes time delays that can be analyzed by the vehicle processing system as described above. In additional embodiments, the response signal can be transmitted from the mobile phone 261 or system 281 at a power level associated with the specified software loop.

FIG. 2G shows a flowchart depicting an illustrative embodiment of a method 207 in accordance with various aspects described herein. In step 2702, a remote entity (e.g. a mobile phone or other system remote from the vehicle) transmits a wake-up signal to the vehicle. The remote entity and the vehicle processing system exchange digital certificates (step 2704), and exchange other signals to determine the signaling round-trip time and the distance between the vehicle and the remote entity (step 2706). The vehicle processing system then selects one or more software loops for sending a challenge (step 2708). A challenge signal is transmitted to the remote entity (step 2710), specifying the software loops (or sequence of loops) to be activated.

The processing system of the remote entity directs the challenge to the one or more software loops specified by the vehicle processing system (step 2712). The remote entity then transmits a response signal (step 2714) or a sequence of response signals, each having a delay time and a signal power level associated with the software loops selected by the vehicle processing system.

The vehicle processing system analyzes the response signal (step 2716); in this embodiment, the delay times and power levels of the response signal are compared with stored values of delay time and power associated with the respective software loops. If the response signal meets prescribed criteria (step 2718/Y), one or more further challenges may be made (step 2720/Y); if not (step 2718/N), the authentication fails. If no further challenges are desired (step 2720/N), the vehicle processing system proceeds (step 2722) to perform or enable the requested operation (e.g. unlock the car).

While for purposes of simplicity of explanation, the respective processes are shown and described as a series of blocks in FIGS. 2E and 2G, it is to be understood and appreciated that the claimed subject matter is not limited by the order of the blocks, as some blocks may occur in different orders and/or concurrently with other blocks from what is depicted and described herein. Moreover, not all illustrated blocks may be required to implement the methods described herein.

Referring now to FIG. 3, a block diagram 300 is shown illustrating an example, non-limiting embodiment of a virtualized communication network in accordance with various aspects described herein. In particular a virtualized communication network is presented that can be used to implement some or all of the subsystems and functions of communication network 100, the subsystems and functions of systems 201 and 206, and methods 205 and 207 presented in FIGS. 1, 2A, 2E, 2F, 2G and 3. For example, virtualized communication network 300 can facilitate in whole or in part transmitting a challenge signal to a key that specifies one or more circuits of the key, receiving from the key a response signal having a response signal power level and a response signal delay with respect to the challenge signal, and analyzing the response signal.

In particular, a cloud networking architecture is shown that leverages cloud technologies and supports rapid innovation and scalability via a transport layer 350, a virtualized network function cloud 325 and/or one or more cloud computing environments 375. In various embodiments, this cloud networking architecture is an open architecture that leverages application programming interfaces (APIs); reduces complexity from services and operations; supports more nimble business models; and rapidly and seamlessly scales to meet evolving customer requirements including traffic growth, diversity of traffic types, and diversity of performance and reliability expectations.

In contrast to traditional network elements—which are typically integrated to perform a single function, the virtualized communication network employs virtual network elements (VNEs) 330, 332, 334, etc. that perform some or all of the functions of network elements 150, 152, 154, 156, etc. For example, the network architecture can provide a substrate of networking capability, often called Network Function Virtualization Infrastructure (NFVI) or simply infrastructure that is capable of being directed with software and Software Defined Networking (SDN) protocols to perform a broad variety of network functions and services. This infrastructure can include several types of substrates. The most typical type of substrate being servers that support Network Function Virtualization (NFV), followed by packet forwarding capabilities based on generic computing resources, with specialized network technologies brought to bear when general purpose processors or general purpose integrated circuit devices offered by merchants (referred to herein as merchant silicon) are not appropriate. In this case, communication services can be implemented as cloud-centric workloads.

As an example, a traditional network element 150 (shown in FIG. 1), such as an edge router can be implemented via a VNE 330 composed of NFV software modules, merchant silicon, and associated controllers. The software can be written so that increasing workload consumes incremental resources from a common resource pool, and moreover so that it's elastic: so the resources are only consumed when needed. In a similar fashion, other network elements such as other routers, switches, edge caches, and middle-boxes are instantiated from the common resource pool. Such sharing of infrastructure across a broad set of uses makes planning and growing infrastructure easier to manage.

In an embodiment, the transport layer 350 includes fiber, cable, wired and/or wireless transport elements, network elements and interfaces to provide broadband access 110, wireless access 120, voice access 130, media access 140 and/or access to content sources 175 for distribution of content to any or all of the access technologies. In particular, in some cases a network element needs to be positioned at a specific place, and this allows for less sharing of common infrastructure. Other times, the network elements have specific physical layer adapters that cannot be abstracted or virtualized, and might require special DSP code and analog front-ends (AFEs) that do not lend themselves to implementation as VNEs 330, 332 or 334. These network elements can be included in transport layer 350.

The virtualized network function cloud 325 interfaces with the transport layer 350 to provide the VNEs 330, 332, 334, etc. to provide specific NFVs. In particular, the virtualized network function cloud 325 leverages cloud operations, applications, and architectures to support networking workloads. The virtualized network elements 330, 332 and 334 can employ network function software that provides either a one-for-one mapping of traditional network element function or alternately some combination of network functions designed for cloud computing. For example, VNEs 330, 332 and 334 can include route reflectors, domain name system (DNS) servers, and dynamic host configuration protocol (DHCP) servers, system architecture evolution (SAE) and/or mobility management entity (MME) gateways, broadband network gateways, IP edge routers for IP-VPN, Ethernet and other services, load balancers, distributers and other network elements. Because these elements don't typically need to forward large amounts of traffic, their workload can be distributed across a number of servers—each of which adds a portion of the capability, and overall which creates an elastic function with higher availability than its former monolithic version. These virtual network elements 330, 332, 334, etc. can be instantiated and managed using an orchestration approach similar to those used in cloud compute services.

The cloud computing environments 375 can interface with the virtualized network function cloud 325 via APIs that expose functional capabilities of the VNEs 330, 332, 334, etc. to provide the flexible and expanded capabilities to the virtualized network function cloud 325. In particular, network workloads may have applications distributed across the virtualized network function cloud 325 and cloud computing environment 375 and in the commercial cloud, or might simply orchestrate workloads supported entirely in NFV infrastructure from these third party locations.

Turning now to FIG. 4, there is illustrated a block diagram of a computing environment in accordance with various aspects described herein. In order to provide additional context for various embodiments of the embodiments described herein, FIG. 4 and the following discussion are intended to provide a brief, general description of a suitable computing environment 400 in which the various embodiments of the subject disclosure can be implemented. In particular, computing environment 400 can be used in the implementation of network elements 150, 152, 154, 156, access terminal 112, base station or access point 122, switching device 132, media terminal 142, and/or VNEs 330, 332, 334, etc. Each of these devices can be implemented via computer-executable instructions that can run on one or more computers, and/or in combination with other program modules and/or as a combination of hardware and software. For example, computing environment 400 can facilitate in whole or in part analyzing a response signal from a circuit of the key by comparing the response signal delay with a predetermined time delay associated with the first circuit and, in accordance with the comparing, determining whether to enable the entry system.

Generally, program modules comprise routines, programs, components, data structures, etc., that perform particular tasks or implement particular abstract data types. Moreover, those skilled in the art will appreciate that the methods can be practiced with other computer system configurations, comprising single-processor or multiprocessor computer systems, minicomputers, mainframe computers, as well as personal computers, hand-held computing devices, microprocessor-based or programmable consumer electronics, and the like, each of which can be operatively coupled to one or more associated devices.

As used herein, a processing circuit includes one or more processors as well as other application specific circuits such as an application specific integrated circuit, digital logic circuit, state machine, programmable gate array or other circuit that processes input signals or data and that produces output signals or data in response thereto. It should be noted that while any functions and features described herein in association with the operation of a processor could likewise be performed by a processing circuit.

The illustrated embodiments of the embodiments herein can be also practiced in distributed computing environments where certain tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules can be located in both local and remote memory storage devices.

Computing devices typically comprise a variety of media, which can comprise computer-readable storage media and/or communications media, which two terms are used herein differently from one another as follows. Computer-readable storage media can be any available storage media that can be accessed by the computer and comprises both volatile and nonvolatile media, removable and non-removable media. By way of example, and not limitation, computer-readable storage media can be implemented in connection with any method or technology for storage of information such as computer-readable instructions, program modules, structured data or unstructured data.

Computer-readable storage media can comprise, but are not limited to, random access memory (RAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM),flash memory or other memory technology, compact disk read only memory (CD-ROM), digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or other tangible and/or non-transitory media which can be used to store desired information. In this regard, the terms “tangible” or “non-transitory” herein as applied to storage, memory or computer-readable media, are to be understood to exclude only propagating transitory signals per se as modifiers and do not relinquish rights to all standard storage, memory or computer-readable media that are not only propagating transitory signals per se.

Computer-readable storage media can be accessed by one or more local or remote computing devices, e.g., via access requests, queries or other data retrieval protocols, for a variety of operations with respect to the information stored by the medium.

Communications media typically embody computer-readable instructions, data structures, program modules or other structured or unstructured data in a data signal such as a modulated data signal, e.g., a carrier wave or other transport mechanism, and comprises any information delivery or transport media. The term “modulated data signal” or signals refers to a signal that has one or more of its characteristics set or changed in such a manner as to encode information in one or more signals. By way of example, and not limitation, communication media comprise wired media, such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media.

With reference again to FIG. 4, the example environment can comprise a computer 402, the computer 402 comprising a processing unit 404, a system memory 406 and a system bus 408. The system bus 408 couples system components including, but not limited to, the system memory 406 to the processing unit 404. The processing unit 404 can be any of various commercially available processors. Dual microprocessors and other multiprocessor architectures can also be employed as the processing unit 404.

The system bus 408 can be any of several types of bus structure that can further interconnect to a memory bus (with or without a memory controller), a peripheral bus, and a local bus using any of a variety of commercially available bus architectures. The system memory 406 comprises ROM 410 and RAM 412. A basic input/output system (BIOS) can be stored in a non-volatile memory such as ROM, erasable programmable read only memory (EPROM), EEPROM, which BIOS contains the basic routines that help to transfer information between elements within the computer 402, such as during startup. The RAM 412 can also comprise a high-speed RAM such as static RAM for caching data.

The computer 402 further comprises an internal hard disk drive (HDD) 414 (e.g., EIDE, SATA), which internal HDD 414 can also be configured for external use in a suitable chassis (not shown), a magnetic floppy disk drive (FDD) 416, (e.g., to read from or write to a removable diskette 418) and an optical disk drive 420, (e.g., reading a CD-ROM disk 422 or, to read from or write to other high capacity optical media such as the DVD). The HDD 414, magnetic FDD 416 and optical disk drive 420 can be connected to the system bus 408 by a hard disk drive interface 424, a magnetic disk drive interface 426 and an optical drive interface 428, respectively. The hard disk drive interface 424 for external drive implementations comprises at least one or both of Universal Serial Bus (USB) and Institute of Electrical and Electronics Engineers (IEEE) 1394 interface technologies. Other external drive connection technologies are within contemplation of the embodiments described herein.

The drives and their associated computer-readable storage media provide nonvolatile storage of data, data structures, computer-executable instructions, and so forth. For the computer 402, the drives and storage media accommodate the storage of any data in a suitable digital format. Although the description of computer-readable storage media above refers to a hard disk drive (HDD), a removable magnetic diskette, and a removable optical media such as a CD or DVD, it should be appreciated by those skilled in the art that other types of storage media which are readable by a computer, such as zip drives, magnetic cassettes, flash memory cards, cartridges, and the like, can also be used in the example operating environment, and further, that any such storage media can contain computer-executable instructions for performing the methods described herein.

A number of program modules can be stored in the drives and RAM 412, comprising an operating system 430, one or more application programs 432, other program modules 434 and program data 436. All or portions of the operating system, applications, modules, and/or data can also be cached in the RAM 412. The systems and methods described herein can be implemented utilizing various commercially available operating systems or combinations of operating systems.

A user can enter commands and information into the computer 402 through one or more wired/wireless input devices, e.g., a keyboard 438 and a pointing device, such as a mouse 440. Other input devices (not shown) can comprise a microphone, an infrared (IR) remote control, a joystick, a game pad, a stylus pen, touch screen or the like. These and other input devices are often connected to the processing unit 404 through an input device interface 442 that can be coupled to the system bus 408, but can be connected by other interfaces, such as a parallel port, an IEEE 1394 serial port, a game port, a universal serial bus (USB) port, an IR interface, etc.

A monitor 444 or other type of display device can be also connected to the system bus 408 via an interface, such as a video adapter 446. It will also be appreciated that in alternative embodiments, a monitor 444 can also be any display device (e.g., another computer having a display, a smart phone, a tablet computer, etc.) for receiving display information associated with computer 402 via any communication means, including via the Internet and cloud-based networks. In addition to the monitor 444, a computer typically comprises other peripheral output devices (not shown), such as speakers, printers, etc.

The computer 402 can operate in a networked environment using logical connections via wired and/or wireless communications to one or more remote computers, such as a remote computer(s) 448. The remote computer(s) 448 can be a workstation, a server computer, a router, a personal computer, portable computer, microprocessor-based entertainment appliance, a peer device or other common network node, and typically comprises many or all of the elements described relative to the computer 402, although, for purposes of brevity, only a remote memory/storage device 450 is illustrated. The logical connections depicted comprise wired/wireless connectivity to a local area network (LAN) 452 and/or larger networks, e.g., a wide area network (WAN) 454. Such LAN and WAN networking environments are commonplace in offices and companies, and facilitate enterprise-wide computer networks, such as intranets, all of which can connect to a global communications network, e.g., the Internet.

When used in a LAN networking environment, the computer 402 can be connected to the LAN 452 through a wired and/or wireless communication network interface or adapter 456. The adapter 456 can facilitate wired or wireless communication to the LAN 452, which can also comprise a wireless AP disposed thereon for communicating with the adapter 456.

When used in a WAN networking environment, the computer 402 can comprise a modem 458 or can be connected to a communications server on the WAN 454 or has other means for establishing communications over the WAN 454, such as by way of the Internet. The modem 458, which can be internal or external and a wired or wireless device, can be connected to the system bus 408 via the input device interface 442. In a networked environment, program modules depicted relative to the computer 402 or portions thereof, can be stored in the remote memory/storage device 450. It will be appreciated that the network connections shown are example and other means of establishing a communications link between the computers can be used.

The computer 402 can be operable to communicate with any wireless devices or entities operatively disposed in wireless communication, e.g., a printer, scanner, desktop and/or portable computer, portable data assistant, communications satellite, any piece of equipment or location associated with a wirelessly detectable tag (e.g., a kiosk, news stand, restroom), and telephone. This can comprise Wireless Fidelity (Wi-Fi) and BLUET0OTH® wireless technologies. Thus, the communication can be a predefined structure as with a conventional network or simply an ad hoc communication between at least two devices.

Wi-Fi can allow connection to the Internet from a couch at home, a bed in a hotel room or a conference room at work, without wires. Wi-Fi is a wireless technology similar to that used in a cell phone that enables such devices, e.g., computers, to send and receive data indoors and out; anywhere within the range of a base station. Wi-Fi networks use radio technologies called IEEE 802.11 (a, b, g, n, ac, ag, etc.) to provide secure, reliable, fast wireless connectivity. A Wi-Fi network can be used to connect computers to each other, to the Internet, and to wired networks (which can use IEEE 802.3 or Ethernet). Wi-Fi networks operate in the unlicensed 2.4 and 5 GHz radio bands for example or with products that contain both bands (dual band), so the networks can provide real-world performance similar to the basic 10BaseT wired Ethernet networks used in many offices.

Turning now to FIG. 5, an embodiment 500 of a mobile network platform 510 is shown that is an example of network elements 150, 152, 154, 156, and/or VNEs 330, 332, 334, etc. For example, platform 510 can facilitate in whole or in part transmitting a challenge signal to the key, the first challenge signal specifying a circuit selected from a plurality of circuits of the key; and receiving a response signal from the key, the response signal having a response signal power level and a response signal delay with respect to the challenge signal. In one or more embodiments, the mobile network platform 510 can generate and receive signals transmitted and received by base stations or access points such as base station or access point 122. Generally, mobile network platform 510 can comprise components, e.g., nodes, gateways, interfaces, servers, or disparate platforms, that facilitate both packet-switched (PS) (e.g., internet protocol (IP), frame relay, asynchronous transfer mode (ATM)) and circuit-switched (CS) traffic (e.g., voice and data), as well as control generation for networked wireless telecommunication. As a non-limiting example, mobile network platform 510 can be included in telecommunications carrier networks, and can be considered carrier-side components as discussed elsewhere herein. Mobile network platform 510 comprises CS gateway node(s) 512 which can interface CS traffic received from legacy networks like telephony network(s) 540 (e.g., public switched telephone network (PSTN), or public land mobile network (PLMN)) or a signaling system #7 (SS7) network 560. CS gateway node(s) 512 can authorize and authenticate traffic (e.g., voice) arising from such networks. Additionally, CS gateway node(s) 512 can access mobility, or roaming, data generated through SS7 network 560; for instance, mobility data stored in a visited location register (VLR), which can reside in memory 530. Moreover, CS gateway node(s) 512 interfaces CS-based traffic and signaling and PS gateway node(s) 518. As an example, in a 3GPP UMTS network, CS gateway node(s) 512 can be realized at least in part in gateway GPRS support node(s) (GGSN). It should be appreciated that functionality and specific operation of CS gateway node(s) 512, PS gateway node(s) 518, and serving node(s) 516, is provided and dictated by radio technology(ies) utilized by mobile network platform 510 for telecommunication over a radio access network 520 with other devices, such as a radiotelephone 575.

In addition to receiving and processing CS-switched traffic and signaling, PS gateway node(s) 518 can authorize and authenticate PS-based data sessions with served mobile devices. Data sessions can comprise traffic, or content(s), exchanged with networks external to the mobile network platform 510, like wide area network(s) (WANs) 550, enterprise network(s) 570, and service network(s) 580, which can be embodied in local area network(s) (LANs), can also be interfaced with mobile network platform 510 through PS gateway node(s) 518. It is to be noted that WANs 550 and enterprise network(s) 570 can embody, at least in part, a service network(s) like IP multimedia subsystem (IMS). Based on radio technology layer(s) available in technology resource(s) or radio access network 520, PS gateway node(s) 518 can generate packet data protocol contexts when a data session is established; other data structures that facilitate routing of packetized data also can be generated. To that end, in an aspect, PS gateway node(s) 518 can comprise a tunnel interface (e.g., tunnel termination gateway (TTG) in 3GPP UMTS network(s) (not shown)) which can facilitate packetized communication with disparate wireless network(s), such as Wi-Fi networks.

In embodiment 500, mobile network platform 510 also comprises serving node(s) 516 that, based upon available radio technology layer(s) within technology resource(s) in the radio access network 520, convey the various packetized flows of data streams received through PS gateway node(s) 518. It is to be noted that for technology resource(s) that rely primarily on CS communication, server node(s) can deliver traffic without reliance on PS gateway node(s) 518; for example, server node(s) can embody at least in part a mobile switching center. As an example, in a 3GPP UMTS network, serving node(s) 516 can be embodied in serving GPRS support node(s) (SGSN).

For radio technologies that exploit packetized communication, server(s) 514 in mobile network platform 510 can execute numerous applications that can generate multiple disparate packetized data streams or flows, and manage (e.g., schedule, queue, format . . . ) such flows. Such application(s) can comprise add-on features to standard services (for example, provisioning, billing, customer support . . . ) provided by mobile network platform 510. Data streams (e.g., content(s) that are part of a voice call or data session) can be conveyed to PS gateway node(s) 518 for authorization/authentication and initiation of a data session, and to serving node(s) 516 for communication thereafter. In addition to application server, server(s) 514 can comprise utility server(s), a utility server can comprise a provisioning server, an operations and maintenance server, a security server that can implement at least in part a certificate authority and firewalls as well as other security mechanisms, and the like. In an aspect, security server(s) secure communication served through mobile network platform 510 to ensure network's operation and data integrity in addition to authorization and authentication procedures that CS gateway node(s) 512 and PS gateway node(s) 518 can enact. Moreover, provisioning server(s) can provision services from external network(s) like networks operated by a disparate service provider; for instance, WAN 550 or Global Positioning System (GPS) network(s) (not shown). Provisioning server(s) can also provision coverage through networks associated to mobile network platform 510 (e.g., deployed and operated by the same service provider), such as the distributed antennas networks shown in FIG. 1(s) that enhance wireless service coverage by providing more network coverage.

It is to be noted that server(s) 514 can comprise one or more processors configured to confer at least in part the functionality of mobile network platform 510. To that end, the one or more processor can execute code instructions stored in memory 530, for example. It is should be appreciated that server(s) 514 can comprise a content manager, which operates in substantially the same manner as described hereinbefore.

In example embodiment 500, memory 530 can store information related to operation of mobile network platform 510. Other operational information can comprise provisioning information of mobile devices served through mobile network platform 510, subscriber databases; application intelligence, pricing schemes, e.g., promotional rates, flat-rate programs, couponing campaigns; technical specification(s) consistent with telecommunication protocols for operation of disparate radio, or wireless, technology layers; and so forth. Memory 530 can also store information from at least one of telephony network(s) 540, WAN 550, SS7 network 560, or enterprise network(s) 570. In an aspect, memory 530 can be, for example, accessed as part of a data store component or as a remotely connected memory store.

In order to provide a context for the various aspects of the disclosed subject matter, FIG. 5, and the following discussion, are intended to provide a brief, general description of a suitable environment in which the various aspects of the disclosed subject matter can be implemented. While the subject matter has been described above in the general context of computer-executable instructions of a computer program that runs on a computer and/or computers, those skilled in the art will recognize that the disclosed subject matter also can be implemented in combination with other program modules. Generally, program modules comprise routines, programs, components, data structures, etc. that perform particular tasks and/or implement particular abstract data types.

Turning now to FIG. 6, an illustrative embodiment of a communication device 600 is shown. The communication device 600 can serve as an illustrative embodiment of devices such as data terminals 114, mobile devices 124, vehicle 126, display devices 144 or other client devices for communication via either communications network 125. For example, computing device 600 can facilitate in whole or in part analyzing a response signal from a selected circuit of a key associated with an entry system, by comparing a response signal power level and a response signal delay respectively with a predetermined first signal power and predetermined first time delay associated with the selected circuit; and, in accordance with the comparing, determining whether to enable the entry system.

The communication device 600 can comprise a wireline and/or wireless transceiver 602 (herein transceiver 602), a user interface (UI) 604, a power supply 614, a location receiver 616, a motion sensor 618, an orientation sensor 620, and a controller 606 for managing operations thereof. The transceiver 602 can support short-range or long-range wireless access technologies such as Bluetooth®, ZigBee®, WiFi, DECT, or cellular communication technologies, just to mention a few (Bluetooth® and ZigBee® are trademarks registered by the Bluetooth® Special Interest Group and the ZigBee® Alliance, respectively). Cellular technologies can include, for example, CDMA-1×, UMTS/HSDPA, GSM/GPRS, TDMA/EDGE, EV/DO, WiMAX, SDR, LTE, as well as other next generation wireless communication technologies as they arise. The transceiver 602 can also be adapted to support circuit-switched wireline access technologies (such as PSTN), packet-switched wireline access technologies (such as TCP/IP, VoIP, etc.), and combinations thereof.

The UI 604 can include a depressible or touch-sensitive keypad 608 with a navigation mechanism such as a roller ball, a joystick, a mouse, or a navigation disk for manipulating operations of the communication device 600. The keypad 608 can be an integral part of a housing assembly of the communication device 600 or an independent device operably coupled thereto by a tethered wireline interface (such as a USB cable) or a wireless interface supporting for example Bluetooth®. The keypad 608 can represent a numeric keypad commonly used by phones, and/or a QWERTY keypad with alphanumeric keys. The UI 604 can further include a display 610 such as monochrome or color LCD (Liquid Crystal Display), OLED (Organic Light Emitting Diode) or other suitable display technology for conveying images to an end user of the communication device 600. In an embodiment where the display 610 is touch-sensitive, a portion or all of the keypad 608 can be presented by way of the display 610 with navigation features.

The display 610 can use touch screen technology to also serve as a user interface for detecting user input. As a touch screen display, the communication device 600 can be adapted to present a user interface having graphical user interface (GUI) elements that can be selected by a user with a touch of a finger. The display 610 can be equipped with capacitive, resistive or other forms of sensing technology to detect how much surface area of a user's finger has been placed on a portion of the touch screen display. This sensing information can be used to control the manipulation of the GUI elements or other functions of the user interface. The display 610 can be an integral part of the housing assembly of the communication device 600 or an independent device communicatively coupled thereto by a tethered wireline interface (such as a cable) or a wireless interface.

The UI 604 can also include an audio system 612 that utilizes audio technology for conveying low volume audio (such as audio heard in proximity of a human ear) and high volume audio (such as speakerphone for hands free operation). The audio system 612 can further include a microphone for receiving audible signals of an end user. The audio system 612 can also be used for voice recognition applications. The UI 604 can further include an image sensor 613 such as a charged coupled device (CCD) camera for capturing still or moving images.

The power supply 614 can utilize common power management technologies such as replaceable and rechargeable batteries, supply regulation technologies, and/or charging system technologies for supplying energy to the components of the communication device 600 to facilitate long-range or short-range portable communications. Alternatively, or in combination, the charging system can utilize external power sources such as DC power supplied over a physical interface such as a USB port or other suitable tethering technologies.

The location receiver 616 can utilize location technology such as a global positioning system (GPS) receiver capable of assisted GPS for identifying a location of the communication device 600 based on signals generated by a constellation of GPS satellites, which can be used for facilitating location services such as navigation. The motion sensor 618 can utilize motion sensing technology such as an accelerometer, a gyroscope, or other suitable motion sensing technology to detect motion of the communication device 600 in three-dimensional space. The orientation sensor 620 can utilize orientation sensing technology such as a magnetometer to detect the orientation of the communication device 600 (north, south, west, and east, as well as combined orientations in degrees, minutes, or other suitable orientation metrics).

The communication device 600 can use the transceiver 602 to also determine a proximity to a cellular, WiFi, Bluetooth®, or other wireless access points by sensing techniques such as utilizing a received signal strength indicator (RSSI) and/or signal time of arrival (TOA) or time of flight (TOF) measurements. The controller 606 can utilize computing technologies such as a microprocessor, a digital signal processor (DSP), programmable gate arrays, application specific integrated circuits, and/or a video processor with associated storage memory such as Flash, ROM, RAM, SRAM, DRAM or other storage technologies for executing computer instructions, controlling, and processing data supplied by the aforementioned components of the communication device 600.

Other components not shown in FIG. 6 can be used in one or more embodiments of the subject disclosure. For instance, the communication device 600 can include a slot for adding or removing an identity module such as a Subscriber Identity Module (SIM) card or Universal Integrated Circuit Card (UICC). SIM or UICC cards can be used for identifying subscriber services, executing programs, storing subscriber data, and so on.

The terms “first,” “second,” “third,” and so forth, as used in the claims, unless otherwise clear by context, is for clarity only and doesn't otherwise indicate or imply any order in time. For instance, “a first determination,” “a second determination,” and “a third determination,” does not indicate or imply that the first determination is to be made before the second determination, or vice versa, etc.

In the subject specification, terms such as “store,” “storage,” “data store,” data storage,” “database,” and substantially any other information storage component relevant to operation and functionality of a component, refer to “memory components,” or entities embodied in a “memory” or components comprising the memory. It will be appreciated that the memory components described herein can be either volatile memory or nonvolatile memory, or can comprise both volatile and nonvolatile memory, by way of illustration, and not limitation, volatile memory, non-volatile memory, disk storage, and memory storage. Further, nonvolatile memory can be included in read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM), or flash memory. Volatile memory can comprise random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, RAM is available in many forms such as synchronous RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct Rambus RAM (DRRAM). Additionally, the disclosed memory components of systems or methods herein are intended to comprise, without being limited to comprising, these and any other suitable types of memory.

Moreover, it will be noted that the disclosed subject matter can be practiced with other computer system configurations, comprising single-processor or multiprocessor computer systems, mini-computing devices, mainframe computers, as well as personal computers, hand-held computing devices (e.g., PDA, phone, smartphone, watch, tablet computers, netbook computers, etc.), microprocessor-based or programmable consumer or industrial electronics, and the like. The illustrated aspects can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network; however, some if not all aspects of the subject disclosure can be practiced on stand-alone computers. In a distributed computing environment, program modules can be located in both local and remote memory storage devices.

In one or more embodiments, information regarding use of services can be generated including services being accessed, media consumption history, user preferences, and so forth. This information can be obtained by various methods including user input, detecting types of communications (e.g., video content vs. audio content), analysis of content streams, sampling, and so forth. The generating, obtaining and/or monitoring of this information can be responsive to an authorization provided by the user. In one or more embodiments, an analysis of data can be subject to authorization from user(s) associated with the data, such as an opt-in, an opt-out, acknowledgement requirements, notifications, selective authorization based on types of data, and so forth.

Some of the embodiments described herein can also employ artificial intelligence (AI) to facilitate automating one or more features described herein. The embodiments (e.g., in connection with automatically identifying acquired cell sites that provide a maximum value/benefit after addition to an existing communication network) can employ various AI-based schemes for carrying out various embodiments thereof. Moreover, the classifier can be employed to determine a ranking or priority of each cell site of the acquired network. A classifier is a function that maps an input attribute vector, x=(x1, x2, x3, x4, . . . , xn), to a confidence that the input belongs to a class, that is, f(x)=confidence (class). Such classification can employ a probabilistic and/or statistical-based analysis (e.g., factoring into the analysis utilities and costs) to determine or infer an action that a user desires to be automatically performed. A support vector machine (SVM) is an example of a classifier that can be employed. The SVM operates by finding a hypersurface in the space of possible inputs, which the hypersurface attempts to split the triggering criteria from the non-triggering events. Intuitively, this makes the classification correct for testing data that is near, but not identical to training data. Other directed and undirected model classification approaches comprise, e.g., naïve Bayes, Bayesian networks, decision trees, neural networks, fuzzy logic models, and probabilistic classification models providing different patterns of independence can be employed. Classification as used herein also is inclusive of statistical regression that is utilized to develop models of priority.

As will be readily appreciated, one or more of the embodiments can employ classifiers that are explicitly trained (e.g., via a generic training data) as well as implicitly trained (e.g., via observing UE behavior, operator preferences, historical information, receiving extrinsic information). For example, SVMs can be configured via a learning or training phase within a classifier constructor and feature selection module. Thus, the classifier(s) can be used to automatically learn and perform a number of functions, including but not limited to determining according to predetermined criteria which of the acquired cell sites will benefit a maximum number of subscribers and/or which of the acquired cell sites will add minimum value to the existing communication network coverage, etc.

As used in some contexts in this application, in some embodiments, the terms “component,” “system” and the like are intended to refer to, or comprise, a computer-related entity or an entity related to an operational apparatus with one or more specific functionalities, wherein the entity can be either hardware, a combination of hardware and software, software, or software in execution. As an example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, computer-executable instructions, a program, and/or a computer. By way of illustration and not limitation, both an application running on a server and the server can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between two or more computers. In addition, these components can execute from various computer readable media having various data structures stored thereon. The components may communicate via local and/or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems via the signal). As another example, a component can be an apparatus with specific functionality provided by mechanical parts operated by electric or electronic circuitry, which is operated by a software or firmware application executed by a processor, wherein the processor can be internal or external to the apparatus and executes at least a part of the software or firmware application. As yet another example, a component can be an apparatus that provides specific functionality through electronic components without mechanical parts, the electronic components can comprise a processor therein to execute software or firmware that confers at least in part the functionality of the electronic components. While various components have been illustrated as separate components, it will be appreciated that multiple components can be implemented as a single component, or a single component can be implemented as multiple components, without departing from example embodiments.

Further, the various embodiments can be implemented as a method, apparatus or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware or any combination thereof to control a computer to implement the disclosed subject matter. The term “article of manufacture” as used herein is intended to encompass a computer program accessible from any computer-readable device or computer-readable storage/communications media. For example, computer readable storage media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips), optical disks (e.g., compact disk (CD), digital versatile disk (DVD)), smart cards, and flash memory devices (e.g., card, stick, key drive). Of course, those skilled in the art will recognize many modifications can be made to this configuration without departing from the scope or spirit of the various embodiments.

In addition, the words “example” and “exemplary” are used herein to mean serving as an instance or illustration. Any embodiment or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word example or exemplary is intended to present concepts in a concrete fashion. As used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims should generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form.

Moreover, terms such as “user equipment,” “mobile station,” “mobile,” subscriber station,” “access terminal,” “terminal,” “handset,” “mobile device” (and/or terms representing similar terminology) can refer to a wireless device utilized by a subscriber or user of a wireless communication service to receive or convey data, control, voice, video, sound, gaming or substantially any data-stream or signaling-stream. The foregoing terms are utilized interchangeably herein and with reference to the related drawings.

Furthermore, the terms “user,” “subscriber,” “customer,” “consumer” and the like are employed interchangeably throughout, unless context warrants particular distinctions among the terms. It should be appreciated that such terms can refer to human entities or automated components supported through artificial intelligence (e.g., a capacity to make inference based, at least, on complex mathematical formalisms), which can provide simulated vision, sound recognition and so forth.

As employed herein, the term “processor” can refer to substantially any computing processing unit or device comprising, but not limited to comprising, single-core processors; single-processors with software multithread execution capability; multi-core processors; multi-core processors with software multithread execution capability; multi-core processors with hardware multithread technology; parallel platforms; and parallel platforms with distributed shared memory. Additionally, a processor can refer to an integrated circuit, an application specific integrated circuit (ASIC), a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic controller (PLC), a complex programmable logic device (CPLD), a discrete gate or transistor logic, discrete hardware components or any combination thereof designed to perform the functions described herein. Processors can exploit nano-scale architectures such as, but not limited to, molecular and quantum-dot based transistors, switches and gates, in order to optimize space usage or enhance performance of user equipment. A processor can also be implemented as a combination of computing processing units.

As used herein, terms such as “data storage,” data storage,” “database,” and substantially any other information storage component relevant to operation and functionality of a component, refer to “memory components,” or entities embodied in a “memory” or components comprising the memory. It will be appreciated that the memory components or computer-readable storage media, described herein can be either volatile memory or nonvolatile memory or can include both volatile and nonvolatile memory.

What has been described above includes mere examples of various embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing these examples, but one of ordinary skill in the art can recognize that many further combinations and permutations of the present embodiments are possible. Accordingly, the embodiments disclosed and/or claimed herein are intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.

In addition, a flow diagram may include a “start” and/or “continue” indication. The “start” and “continue” indications reflect that the steps presented can optionally be incorporated in or otherwise used in conjunction with other routines. In this context, “start” indicates the beginning of the first step presented and may be preceded by other activities not specifically shown. Further, the “continue” indication reflects that the steps presented may be performed multiple times and/or may be succeeded by other activities not specifically shown. Further, while a flow diagram indicates a particular ordering of steps, other orderings are likewise possible provided that the principles of causality are maintained.

As may also be used herein, the term(s) “operably coupled to”, “coupled to”, and/or “coupling” includes direct coupling between items and/or indirect coupling between items via one or more intervening items. Such items and intervening items include, but are not limited to, junctions, communication paths, components, circuit elements, circuits, functional blocks, and/or devices. As an example of indirect coupling, a signal conveyed from a first item to a second item may be modified by one or more intervening items by modifying the form, nature or format of information in a signal, while one or more elements of the information in the signal are nevertheless conveyed in a manner than can be recognized by the second item. In a further example of indirect coupling, an action in a first item can cause a reaction on the second item, as a result of actions and/or reactions in one or more intervening items.

Although specific embodiments have been illustrated and described herein, it should be appreciated that any arrangement which achieves the same or similar purpose may be substituted for the embodiments described or shown by the subject disclosure. The subject disclosure is intended to cover any and all adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, can be used in the subject disclosure. For instance, one or more features from one or more embodiments can be combined with one or more features of one or more other embodiments. In one or more embodiments, features that are positively recited can also be negatively recited and excluded from the embodiment with or without replacement by another structural and/or functional feature. The steps or functions described with respect to the embodiments of the subject disclosure can be performed in any order. The steps or functions described with respect to the embodiments of the subject disclosure can be performed alone or in combination with other steps or functions of the subject disclosure, as well as from other embodiments or from other steps that have not been described in the subject disclosure. Further, more than or less than all of the features described with respect to an embodiment can also be utilized. 

What is claimed is:
 1. A device, comprising: a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising: selecting a first circuit from a plurality of circuits of a key remote from the device and associated with an entry system coupled to the device; wirelessly transmitting a first challenge signal to the key, the first challenge signal specifying the first circuit; wirelessly receiving a first response signal from the key, the first response signal having a first response signal power level and a first response signal delay, wherein the first response signal delay is a sum of a basic challenge signal round trip time and a first response delay time; analyzing the first response signal by comparing the first response signal power level and the first response delay time respectively with a predetermined first signal power and a predetermined first delay time associated with the first circuit; and in accordance with the comparing, determining whether to enable the entry system.
 2. The device of claim 1, wherein the first circuit is one of a sequence of circuits selected from the plurality of circuits, and wherein the first challenge signal specifies the sequence of circuits.
 3. The device of claim 2, wherein the sequence of circuits comprises a second circuit different from the first circuit, and wherein the analyzing further comprises comparing the first response delay time with a sum of the predetermined first delay time and a predetermined second delay time associated with the second circuit.
 4. The device of claim 2, wherein the sequence of circuits is selected in a random selection procedure.
 5. The device of claim 1, wherein the operations further comprise: selecting a second circuit from the plurality of circuits; wirelessly transmitting a second challenge signal to the key, the second challenge signal specifying the second circuit; wirelessly receiving a second response signal from the key, the second response signal having a second response signal power level and a second response signal delay, wherein the second response signal delay is a sum of the basic challenge signal round trip time and a second response delay time; and analyzing the second response signal by comparing the second response signal power level and the second response delay time respectively with a predetermined second signal power and a predetermined second delay time associated with the second circuit, wherein the determining whether to enable the entry system is performed subsequent to the analyzing the first response signal and the analyzing the second response signal.
 6. The device of claim 5, wherein the second challenge signal is transmitted at a random time interval subsequent to the first challenge signal.
 7. The device of claim 5, wherein at least one of the first challenge signal and the second challenge signal specifies a sequence of circuits selected from the plurality of circuits.
 8. The device of claim 1, wherein the processing system comprises a radio frequency identification (RFID) reader, and wherein the plurality of circuits of the key comprises a plurality of RFID circuits.
 9. The device of claim 1, wherein the operations further comprise determining a distance between the device and the key, and wherein the entry system is not enabled in accordance with the distance being greater than a predetermined threshold distance.
 10. The device of claim 1, wherein the entry system comprises a door lock of a vehicle, a trunk lock of the vehicle, a switch controlling lights of the vehicle, or any combination thereof.
 11. A non-transitory machine-readable medium comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, the operations comprising: selecting a first circuit from a plurality of circuits of a key remote from the processing system and associated with an entry system coupled to the processing system; wirelessly transmitting a first challenge signal to the key, the first challenge signal specifying the first circuit; wirelessly receiving a first response signal from the key, the first response signal having a first response signal delay, wherein the first response signal delay is a sum of a basic challenge signal round trip time and a first response delay time; analyzing the first response signal by comparing the first response delay time with a predetermined first delay time associated with the first circuit; and in accordance with the comparing, determining whether to enable the entry system.
 12. The non-transitory machine-readable medium of claim 11, wherein the first circuit is one of a sequence of circuits selected from the plurality of circuits, and wherein the first challenge signal specifies the sequence of circuits.
 13. The non-transitory machine-readable medium of claim 11, wherein the operations further comprise: selecting a second circuit from the plurality of circuits; wirelessly transmitting a second challenge signal to the key, the second challenge signal specifying the second circuit; wirelessly receiving a second response signal from the key, the second response signal having a second response signal delay, wherein the second response signal delay is a sum of the basic challenge signal round trip time and a second response delay time; and analyzing the second response signal by comparing the second response delay time with a predetermined second delay time associated with the second circuit, wherein the determining whether to enable the entry system is performed subsequent to the analyzing the first response signal and the analyzing the second response signal.
 14. The non-transitory machine-readable medium of claim 13, wherein the second challenge signal is transmitted at a random time interval subsequent to the first challenge signal.
 15. The non-transitory machine-readable medium of claim 11, wherein the processing system comprises a radio frequency identification (RFID) reader, and wherein the plurality of circuits of the key comprises a plurality of RFID circuits.
 16. A method, comprising: selecting, by a processing system including a processor, a first circuit from a plurality of circuits of a key remote from the processing system and associated with an entry system coupled to the processing system; transmitting, by the processing system, a first challenge signal to the key, the first challenge signal specifying the first circuit; receiving, by the processing system, a first response signal from the key, the first response signal having a first response signal power level and a first response signal delay, wherein the first response signal delay is a sum of a basic challenge signal round trip time and a first response delay time; analyzing, by the processing system, the first response signal by comparing the first response signal power level and the first response delay time respectively with a predetermined first signal power and a predetermined first delay time associated with the first circuit; and determining, by the processing system in accordance with the comparing, whether to enable the entry system, the entry system comprising a door lock of a vehicle, a trunk lock of the vehicle, a switch controlling lights of the vehicle, or any combination thereof.
 17. The method of claim 16, wherein the first circuit is one of a sequence of circuits selected from the plurality of circuits, the sequence of circuits comprising a second circuit different from the first circuit.
 18. The method of claim 16, further comprising: selecting, by the processing system, a second circuit from the plurality of circuits; transmitting, by the processing system, a second challenge signal to the key, the second challenge signal specifying the second circuit; receiving, by the processing system, a second response signal from the key, the second response signal having a second response signal power level and a second response signal delay, wherein the second response signal delay is a sum of the basic challenge signal round trip time and a second response delay time; and analyzing, by the processing system, the second response signal by comparing the second response signal power level and the second response delay time respectively with a predetermined second signal power and a predetermined second delay time associated with the second circuit, wherein the determining whether to enable the entry system is performed subsequent to the analyzing the first response signal and the analyzing the second response signal.
 19. The method of claim 18, wherein the second challenge signal is transmitted at a random time interval subsequent to the first challenge signal.
 20. The method of claim 16, wherein the processing system comprises a radio frequency identification (RFID) reader, and wherein the plurality of circuits of the key comprises a plurality of RFID circuits. 